Number of providers by state who wrote at least 3,000 prescriptions for Schedule 2 controlled substances in 2012 in Medicare Part D.
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ProPublica/NPR

Number of providers by state who wrote at least 3,000 prescriptions for Schedule 2 controlled substances in 2012 in Medicare Part D.

ProPublica/NPR

Despite a national crackdown on prescription drug abuse, doctors churned out an ever-larger number of prescriptions for the most-potent controlled substances to Medicare patients, new data show.

In addition, ProPublica found, the most prolific prescribers of such drugs as oxycodone, fentanyl, morphine and Ritalin often have worrisome records.

In 2012, the most recent year for which data is available, Medicare covered nearly 27 million prescriptions for powerful narcotic painkillers and stimulants with the highest potential for abuse and dependence. That's up 9 percent over 2011, compared to a 5 percent increase in Medicare prescriptions overall. Even taking into account an increase in the number of Medicare enrollees, the prescribing rate rose slightly for these drugs, which are classified as Schedule 2 controlled substances by the Drug Enforcement Administration.

Twelve of Medicare's top 20 prescribers of Schedule 2 drugs in 2012 have faced disciplinary actions by their state medical boards or criminal charges related to their medical practices, and another had documents seized from his office by federal agents.

The No. 1 prescriber — Dr. Shelinder Aggarwal of Huntsville, Ala., with more than 14,000 Schedule 2 prescriptions in 2012 — had his controlled substances certificate suspended by the state medical board in March 2013. He surrendered his medical license four months later. (Aggarwal could not be reached for comment.)

Prescribing high volumes of Schedule 2 drugs can indicate a doctor is running a pill mill, said Dr. Andrew Kolodny, chief medical officer of Phoenix House, a New York-based drug treatment provider. Government regulators should do more to monitor prescribing patterns and intervene proactively if they appear aberrant, he said.

Medicare's drug program, known as Part D, now covers about 38 million seniors and disabled people and pays for more than one of every four prescriptions dispensed in this country. Concerns about oversight of controlled substances date back to at least 2011, when the Government Accountability Office highlighted abuse of opioids in Part D and called on Medicare to take action.

Within the past year, Medicare has started to use prescribing data to identify potentially problematic doctors, as have some state medical boards. Beginning in mid-2015, Medicare will have the authority to kick doctors out of the program if they prescribe in abusive ways.

"It's a real area of concern for us," said Dr. Shantanu Agrawal, director of the Center for Program Integrity within the federal Centers for Medicare and Medicaid Services.

The 2012 data shows the upward trend line for prescriptions of controlled substances before these initiatives took hold.

The Drug Enforcement Administration classifies certain potent drugs based on their potential for abuse and sets limits on prescribing for each group. Drugs classified as Schedule 2 require written prescriptions and cannot be refilled.

Shelinder Aggarwal's Medicare prescribing history had plenty of red flags. The pain medicine specialist has consistently shown up in Medicare's data as a top prescriber of narcotics. By 2012, the year before he stopped practicing, more than 80 percent of his Medicare patients received at least one prescription for a Schedule 2 drug, in many cases oxycodone.

It took complaints from pharmacies near Aggarwal's office to alert the Alabama Board of Medical Examiners to his unusual prescribing habits, said Larry Dixon, the board's executive director. Board investigators subsequently made undercover visits to the doctor's office and videotaped him prescribing drugs without an exam.

"If you paid $1,200 in cash, they would put a VIP stamp on your medical records and you didn't ever have to have an appointment," Dixon said.

Medicare's Part D data draws a roadmap to the doctors who prescribe controlled substances most frequently.

In 2012, 269 providers wrote at least 3,000 prescriptions for Schedule 2 drugs, ProPublica's analysis shows. They were concentrated in a handful of states. Florida led the country with 52 providers, followed by Tennessee with 25. (Look up your doctor using our Prescriber Checkup tool.)

About one in five doctors who wrote at least 3,000 prescriptions for Schedule 2 drugs have faced some kind of sanction or investigation, ProPublica found.

In September, Medicare sent 760 letters to doctors who prescribed far more Schedule 2 drugs than others in their medical specialty and state. Officials hope the initiative will cause doctors to examine their prescribing and make changes.

"Simply being an outlier doesn't establish that you're doing something wrong," said CMS' Agrawal. "What we are trying to do is give physicians the ability to assess themselves, given their comparative data."

Medicare also has sent information on 71 prescribers for possible investigation to the inspector general of the U.S. Department of Health and Human Services, and on one doctor to a state medical board.

Some medical licensing boards are also expanding their efforts to use data to spot problematic prescribing. North Carolina's medical board has proposed new regulations allowing the agency that runs the state's prescription drug monitoring program to share data with the board. The board currently can only access the data when it is pursuing an active investigation into a particular physician.

Dixon, the Alabama board's executive director, and Henderson said their states' changes are not meant to impede legitimate care by doctors.

"Most of these people are just as genuine as you could possibly hope," Dixon said.

Data, alone, can be misleading. Dr. Mark Ellis, a pain specialist in Athens, Ga., was the third-highest prescriber of Schedule 2 drugs in the country in 2012, with more than 10,000 prescriptions. But unlike many states, Georgia does not allow nurse practitioners and physician assistants to write prescriptions for these controlled substances on their own, requiring them to be signed by a physician. As a result, Ellis said he was credited with the prescribing of four other professionals in his practice. (Ellis was fined by Georgia's medical board in July 2005 for working with a physician assistant without consent from the board.)

With scrutiny of painkiller prescribing on the rise, Ellis said he attempts to ensure that patients are taking, not selling, their pills by requiring frequent drug testing.

Rules put in place by several states have reduced prescribing of narcotics, experts say. New York, Kentucky and Tennessee now require that doctors check databases that track every controlled substance prescription in their states before prescribing such drugs to patients for the first time and at certain intervals afterward. Other states are considering or are in the process of implementing similar rules.

Mandatory checks are "the most-effective single tool we've found yet to address this problem," said John Eadie, director of the Prescription Drug Monitoring Program Center of Excellence at Brandeis University.

ProPublica is a nonprofit investigative reporting newsroom based in New York.

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